Christian Breunig d235b31a09 T861: sign all Kernel modules with an ephemeral key
The shim review board (which is the secure boot base loader) recommends using
ephemeral keys when signing the Linux Kernel. This commit enables the Kernel
build system to generate a one-time ephemeral key that is used to:

* sign all build-in Kernel modules
* sign all other out-of-tree Kernel modules

The key lives in /tmp and is destroyed after the build container exits and is
named: "VyOS build time autogenerated kernel key".

In addition the Kernel now uses CONFIG_MODULE_SIG_FORCE. This now makes it
unable to load any Kernel Module to the image that is NOT signed by the
ephemeral key.
2024-09-25 20:24:21 +02:00

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#!/bin/sh
CWD=$(pwd)
KERNEL_VAR_FILE=${CWD}/kernel-vars
if ! dpkg-architecture -iamd64; then
echo "Intel-QAT is only buildable on amd64 platforms"
exit 0
fi
if [ ! -f ${KERNEL_VAR_FILE} ]; then
echo "Kernel variable file '${KERNEL_VAR_FILE}' does not exist, run ./build_kernel.sh first"
exit 1
fi
. ${KERNEL_VAR_FILE}
url="https://dev.packages.vyos.net/source-mirror/QAT.L.4.24.0-00005.tar.gz"
cd ${CWD}
DRIVER_FILE=$(basename ${url} | sed -e s/tar_0/tar/)
DRIVER_DIR="${DRIVER_FILE%.tar.gz}"
DRIVER_NAME="QAT"
DRIVER_NAME_EXTRA="L."
DRIVER_VERSION=$(echo ${DRIVER_DIR} | awk -F${DRIVER_NAME} '{print $2}' | awk -F${DRIVER_NAME_EXTRA} '{print $2}')
DRIVER_VERSION_EXTRA="-0"
# Build up Debian related variables required for packaging
DEBIAN_ARCH=$(dpkg --print-architecture)
DEBIAN_DIR="${CWD}/vyos-intel-${DRIVER_NAME}_${DRIVER_VERSION}${DRIVER_VERSION_EXTRA}_${DEBIAN_ARCH}"
DEBIAN_CONTROL="${DEBIAN_DIR}/DEBIAN/control"
DEBIAN_POSTINST="${CWD}/vyos-intel-qat.postinst"
# Fetch Intel driver source from SourceForge
if [ -e ${DRIVER_FILE} ]; then
rm -f ${DRIVER_FILE}
fi
curl -L -o ${DRIVER_FILE} ${url}
if [ "$?" -ne "0" ]; then
exit 1
fi
# Unpack archive
if [ -d ${DRIVER_DIR} ]; then
rm -rf ${DRIVER_DIR}
fi
mkdir -p ${DRIVER_DIR}
tar -C ${DRIVER_DIR} -xf ${DRIVER_FILE}
cd ${DRIVER_DIR}
if [ -z $KERNEL_DIR ]; then
echo "KERNEL_DIR not defined"
exit 1
fi
echo "I: Compile Kernel module for Intel ${DRIVER_NAME} driver"
mkdir -p \
${DEBIAN_DIR}/lib/firmware \
${DEBIAN_DIR}/usr/sbin \
${DEBIAN_DIR}/usr/lib/x86_64-linux-gnu \
${DEBIAN_DIR}/etc/init.d
KERNEL_SOURCE_ROOT=${KERNEL_DIR} ./configure --enable-kapi --enable-qat-lkcf
make -j $(getconf _NPROCESSORS_ONLN) all
make INSTALL_MOD_PATH=${DEBIAN_DIR} INSTALL_FW_PATH=${DEBIAN_DIR} \
qat-driver-install adf-ctl-all
if [ "x$?" != "x0" ]; then
exit 1
fi
cp quickassist/qat/fw/*.bin ${DEBIAN_DIR}/lib/firmware
cp build/*.so ${DEBIAN_DIR}/usr/lib/x86_64-linux-gnu
cp build/adf_ctl ${DEBIAN_DIR}/usr/sbin
cp quickassist/build_system/build_files/qat_service ${DEBIAN_DIR}/etc/init.d
cp build/usdm_drv.ko ${DEBIAN_DIR}/lib/modules/${KERNEL_VERSION}${KERNEL_SUFFIX}/updates/drivers
chmod 644 ${DEBIAN_DIR}/lib/firmware/*
chmod 755 ${DEBIAN_DIR}/etc/init.d/* ${DEBIAN_DIR}/usr/local/bin/*
if [ -f ${DEBIAN_DIR}.deb ]; then
rm ${DEBIAN_DIR}.deb
fi
# build Debian package
echo "I: Building Debian package vyos-intel-${DRIVER_NAME}"
cd ${CWD}
# Sign generated Kernel modules
${CWD}/sign-modules.sh ${DEBIAN_DIR}
# delete non required files which are also present in the kernel package
# und thus lead to duplicated files
find ${DEBIAN_DIR} -name "modules.*" | xargs rm -f
echo "#!/bin/sh" > ${DEBIAN_POSTINST}
echo "/sbin/depmod -a ${KERNEL_VERSION}${KERNEL_SUFFIX}" >> ${DEBIAN_POSTINST}
fpm --input-type dir --output-type deb --name vyos-intel-${DRIVER_NAME} \
--version ${DRIVER_VERSION}${DRIVER_VERSION_EXTRA} --deb-compression gz \
--maintainer "VyOS Package Maintainers <maintainers@vyos.net>" \
--description "Vendor based driver for Intel ${DRIVER_NAME}" \
--depends linux-image-${KERNEL_VERSION}${KERNEL_SUFFIX} \
--license "GPL2" -C ${DEBIAN_DIR} --after-install ${DEBIAN_POSTINST}
echo "I: Cleanup ${DRIVER_NAME} source"
cd ${CWD}
if [ -e ${DRIVER_FILE} ]; then
rm -f ${DRIVER_FILE}
fi
if [ -d ${DRIVER_DIR} ]; then
rm -rf ${DRIVER_DIR}
fi
if [ -d ${DEBIAN_DIR} ]; then
rm -rf ${DEBIAN_DIR}
fi
if [ -f ${DEBIAN_POSTINST} ]; then
rm -f ${DEBIAN_POSTINST}
fi